tab_width

Columns a tab occupies when measuring line width.

Default: 4

Curb's output is not always a fixed point of the tool(s) below for this key — see conformance divergences for the full registry.

• dotnet-format-whitespace: Measured on a case combining indent_style = tab, tab_width = 8 and a width narrow enough to force parameter-list wrapping: dotnet format converts the outer two levels of tab indentation to four-space equivalents while leaving the wrapped argument lines as tabs, an inconsistent application of indent_style = tab that only shows up in this combination — not reproduced with indent_style = tab alone, or with reflow alone. Not fully root-caused (looks like a quirk in Roslyn's own formatter under this specific combination); recorded as observed rather than fully explained. tab_width has no dotnet format equivalent to check reflow width against outside this interaction, since dotnet format does not reflow at all. (CoreOptionTests.Tab_width_counts_toward_the_line_length)
• ide0055: Same not-fully-root-caused divergence as the dotnet-format-whitespace entry above (indent_style = tab combined with a width narrow enough to force wrapping), now confirmed to reproduce under a real dotnet build -p:EnforceCodeStyleInBuild=true as well as the dotnet format whitespace CLI. (CoreOptionTests.Tab_width_counts_toward_the_line_length)

This option accepts a freeform value. No canned example is generated.

tab_width = <value>